If you are using the engageNY math program in second grade, this is just what you need to make your lessons go more smoothly. This is the complete Module 5. This includes topics A-D, lessons 1-20. Don't purchase this if you bought either 5a or 5b separately. Many of the pages are interactive and directions for how to use the pages are included. Don't forget to download the teaching instructions from the engageNY site.